Home / 1,541.42-2,312.21-430.91

Finding the Fourth Proportional to 1,541.42, 2,312.21 and 430.91

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Solution

The fourth proportional to 1,541.42, 2,312.21 and 430.91 is: 646.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,541.42 : 2,312.21 = 430.91 : x
  2. Step 2: Convert to fraction form
    1,541.42/2,312.21 = 430.91/x
  3. Step 3: Cross multiply
    1,541.42x = 2,312.21 × 430.91
  4. Step 4: Simplify right side
    1,541.42x = 996,358.04
  5. Step 5: Solve for x
    x = 996,358.04/1,541.42
  6. Step 6: Final answer
    x = 646.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.